The New Sudoku Players' Forum

[claudiarabia]

This one has a swordfish but it can be avoided.
There are available: x, xy, xyz, Turbots, sky, sword, UR, that I know of.

Code: Select all

2 1 . | . . . | . . 7
4 7 . | 6 . . | 1 . .
. . 9 | . . 7 | . 3 .
---------------------
. 2 . | . 4 . | 7 . .
. . . | 8 . 6 | . . .
. . 7 | . 3 . | . 9 .
---------------------
. 5 . | 9 . . | 8 . .
. . 4 | . . 2 | . 5 1
8 . . | . . . | . 4 2



I like this puzzle of wapati. I simplified it a bit. Fewer clues, fewer strategies.

Code: Select all

5 8 . . . . . . .
4 . . 6 . . 1 . .
. . 9 . . 7 . 3 .
. 2 . . 9 . 7 . .
. . . 8 . 6 . . .
. . 7 . 1 . . 9 .
. 5 . 9 . . 8 . .
. . 4 . . 2 . . 7
. . . . . . . 1 6


Interesting is the mutable cell in r6c3. If it is not 7 but 3 you get a very hard puzzle out of it.

[udosuk]

Do you mean Mike Barkers postings on these pages?
http://forum.enjoysudoku.com/viewtopic.php?t=4899&start=15
http://forum.enjoysudoku.com/viewtopic.php?p=26448#p26448

Thanks Claudia... These pages should contain the info I need...

By the way, as far as preferring non-uniqueness moves goes, don't forget RW's overlooked article Logical use of uniqueness technique in an uniqueness test.

Thanks rep'nA for the interesting link... However I don't suppose the logical usage is applicable in this puzzle ?!

[wapati]

This one is nasty by my way of solving.

SE is quite shorter but with APE (I guess I should learn it?) and UR and Bi-X.

My way takes a week or two and still needs UR.

Code: Select all

. 7 .|5 . .|. 3 .
6 . 4|. . .|. . 8
. 5 .|. . 7|1 . .
-----+-----+-----
2 . .|. 3 .|9 . .
. . .|2 . 4|. . .
. . 6|. 9 .|. . 7
-----+-----+-----
. . 5|6 . .|. 9 .
9 . .|. . .|7 . 5
. 8 .|. . 5|. 4 .

[wapati]

You need to know finned/sashimi fish for this, pattern wise.

Code: Select all

. . . | . 1 3 | . 5 2
. . . | 2 . . | 8 . 9
. . . | . 8 . | . 6 .
---------------------
. 9 . | . 6 1 | . . 5
5 . 7 | 8 . 2 | 3 . 6
6 . . | 3 5 . | . 4 .
---------------------
. 6 . | . 3 . | . . .
1 . 2 | . . 4 | . . .
7 5 . | 6 2 . | . . .

[wapati]

There is a doubly usefull uniqueness pattern in this puzlle but fish patterns can solve it without the UR.

Code: Select all

. 3 7 | . . . | 1 . 5
8 . . | . 7 . | . . .
2 . 9 | 6 . . | . . 4
---------------------
. . 6 | 4 5 . | . . .
. 2 . | 3 . 6 | . 4 .
. . . | . 2 1 | 5 . .
---------------------
4 . . | . . 9 | 2 . 7
. . . | . 4 . | . . 6
5 . 1 | . . . | 4 3 .

[wapati]

A finned jelly and a finned sword plus xy and x and Turbots.

Code: Select all

3 . . | . . . | . 2 .
. . 7 | 1 . 3 | . . 4
. 4 . | . . . | 3 . .
---------------------
. 3 . | 4 5 . | . 9 .
. . . | 3 . 6 | . . .
. 5 . | . 2 1 | . 4 .
---------------------
. . 9 | . . . | . 5 .
4 . . | 6 . 2 | 8 . .
. 2 . | . . . | . . 9

[wapati]

This one can be solved with just the three Turbots.
Turbot "classic", two string kite and skyscraper, one of each.

There are many other ways to solve it but these three, in some order, can do it. Pretty easy puzzle aside from this challenge.

Code: Select all

4 . . | 6 . . | . 2 .
. . 6 | . 7 . | . 9 1
. 1 . | 8 . . | . . .
---------------------
5 . 4 | . . . | . . .
. 9 . | . . . | . 6 .
. . . | . . . | 1 . 8
---------------------
. . . | . . 1 | . 3 .
9 8 . | . 3 . | 5 . .
. 3 . | . . 7 | . . 9

[wapati]

Pattern solvers....good luck!

Another "borrible".

Code: Select all

. . . | . . . | . 7 5
. . 7 | 9 . . | . . 6
. 8 . | 7 5 . | 2 . .
---------------------
. 9 2 | . 8 . | . . .
. . 5 | 6 . 9 | 7 . .
. . . | . 7 . | 9 2 .
---------------------
. . 4 | . 9 6 | . 8 .
9 . . | . . 1 | 4 . .
5 6 . | . . . | . . .

[wapati]

Whew, what to say. Emm, lots of work, pattern wise. Fins, for true.

Code: Select all

. 1 .|2 . 6|. . .
7 . 2|. . 4|1 . .
. 6 .|. . .|5 4 .
-----+-----+-----
6 . .|. 1 .|. 3 4
. . .|6 . 7|. . .
1 5 .|. 4 .|. . 7
-----+-----+-----
. 7 1|. . .|. 5 .
. . 4|7 . .|8 . 3
. . .|4 . 5|. 2 .

(Edited for typos)

[udosuk]

Whew, what to say. Emm, lots of work, pattern wise. Fins, for true.

What has this puzzle got to do with emm?

[wapati]

What has this puzzle got to do with emm?

Sorry?

To me (Canada, english native language) "emm" is "umm" or "err".

What is "emm" to you?

[udosuk]

Hahaha... emm is one of the more prominent posters in this forum, but more active in the Off-Topic forum...

If you check the Memberlist, and look up the "Top Ten Posters" in "Descending" order, she's #5 at the moment...

[wapati]

Err, I'll switch stallers.

This one needs an xy but has many other pattern potentials, big fish and small.

Code: Select all

. 3 9 | . 6 . | . . .
1 5 . | 8 . . | . 3 .
8 . . | . . 1 | . . .
---------------------
. 1 . | . 7 . | 4 . .
4 . . | 2 . 5 | . . 9
. . 5 | . 8 . | . 2 .
---------------------
. . . | 3 . . | . . 7
. 9 . | . . 7 | . 4 6
. . . | . 9 . | 8 1 .

[wapati]

Lots of methods, often more than once.

Code: Select all

. . 8 | . 3 . | . . .
. 6 . | . . 1 | 7 . .
7 . . | . . 4 | . 3 .
---------------------
. . . | . 5 . | 3 6 .
4 . . | 2 . 6 | . . 5
. 5 6 | . 8 . | . . .
---------------------
. 9 . | 6 . . | . . 4
. . 2 | 3 . . | . 1 .
. . . | . 1 . | 5 . .

[wapati]

There is a Jelly, you cannot avoid, pattern wise.

Tough puzzle, for me. [Very tough, for me]

Code: Select all

4 . 5 | 7 . . | . . .
. . 7 | . 2 6 | . . .
2 8 . | . . 1 | . . .
---------------------
7 . . | . 8 . | 6 9 .
. 6 . | 1 . 9 | . 3 .
. 9 2 | . 6 . | . . 8
---------------------
. . . | 6 . . | . 1 9
. . . | 9 1 . | 8 . .
. . . | . . 4 | 2 . 3